body,
h1,
h2,
h3,
h4,
h5,
h6,
p,
ul,
ol,
li,
dl,
dt,
dd,
input{
    margin: 0;
    padding: 0;
}

*{
    margin: 0;
    padding: 0;
    /*内减模式*/
    box-sizing: border-box;
}
img{
    vertical-align: middle;
}
.fr{
    float: right;
}
.fl{
    float: left;
}
li{
    list-style: none;
}
a{  
    text-decoration: none;
}
.clearfix::before,.clearfix::after{
    content: "";
    display: table;

}
.clearfix::after{
    clear: both;
}

